| Xerophobic |
Sat Jul 26, 2025 12:08 pm |
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Hey all. I have been using my 4 seat buggy I built for a few seasons now and its time to remedy a bunch of the smaller stuff from the donor parts i used. My engine is a 1600 DP but the rest of my drivetrain is late 50's/early 60's stuff I believe. Definitely swing axle rear end and link pin front. I already did the front brakes.
Anyway the one side rear brake drum has gotten extremely sloppy and I figured it was the wheel bearing but after taking it apart i see that its severely worn splines on the drum which is actually good because its much easier to fix however i do not see how the drum is "secured" to the axle. There was a crown nut with cotter pin, a spacer and then the drum. There appears to be nothing else on the splines behind the drum until the bearing itself. It does not appear anything prevents the drum from sliding inwards on the spline until it contacts the backing plate, or whatever else stops it from moving "inwards". Is there supposed to be some form of spacer that slides onto the splines that the nut clamps the drum to??? seems to me even with a new drum it will still drag on something "behind it"
Also I removed the plate on one side to raise the rear end to gain some ground clearance on the torsion arms and went down two splines. It was previously a bit "saggy" so I figured two splines wasnt a ton. I am having a hell of a time getting the torsion arm compressed again. I did not think two splines was a crazy movement but it is SUPER hard to rotate the rear arm to get that plate back on. is two splines really that much???
TIA the buggy has been great but as with most projects once they are working you hate taking things apart to repair stuff!
(I have broken the trans mount twice so the off road straps are going in and rear skid plate/belly pan. I use the buggy for camping, mostly on logging roads so nothing too extreme)
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| MrGoodtunes |
Sat Jul 26, 2025 1:57 pm |
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Xerophobic wrote: ... i do not see how the drum is "secured" to the axle ...
Rear axle nut needs to be torqued to 250 foot-pounds, securing brake drum up against an oil slinger inside of bearing seal:
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| Dale M. |
Sat Jul 26, 2025 3:58 pm |
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NOt quite so confusing....
If there is a spacer behind castle nut it means you have a late model rear drum that is for a short spline axle so spacer is mandatory for long spline axle....
Besure bevel side of spacer #10 is towards "O" ring.... |
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| Xerophobic |
Sat Jul 26, 2025 4:37 pm |
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i think looking closer at it the drum is just so worn the inner boss/flange doesnt contact the bearing inner race hard enough to get anywhere near that type of torque on the nut. I think thats why i assumed there was a washer or spacer missing. Ill get that new drum on the way and think that will cure the problem, the shaft and bearing feel good and tight but the splines on the drum are very worn for sure.
Cheers |
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| Xerophobic |
Sat Jul 26, 2025 4:40 pm |
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Dale M. wrote: NOt quite so confusing....
If there is a spacer behind castle nut it means you have a late model rear drum that is for a short spline axle so spacer is mandatory for long spline axle....
Besure bevel side of spacer #10 is towards "O" ring....
Yea it definitely has a spacer behind the nut. You cant quite see it in the pic from when I first got it rolling. I will make sure to have a close look at the part number before I buy a new drum....
Of course now I cant get the bolt out of the frame horn on that side to install the off road motor mounts grrrrrrrrrrrrr |
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| BFB |
Sun Jul 27, 2025 10:00 am |
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| If the drum has been that loose for a while it probably hammered out the back side of it where itd contact the spacer too, hopefully your axle splines aren’t to worn as well. Couldnt hurt to replace the spacer, and inspect the bearing too while your there |
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| oprn |
Mon Jul 28, 2025 6:27 am |
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| They usually leak transmission oil when they get that loose. Check your oil level. |
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